Amplifier



FIG. 1 is an isometric top view of the new design for an amplifier;

FIG. 2 is an isometric bottom view of the new design for an amplifier;

FIG. 3 is a front view of the amplifier;

FIG. 4 is a back view of the amplifier;

FIG. 5 is a left side view of the amplifier;

FIG. 6 is a right side view of the amplifier;

FIG. 7 is a top view of the amplifier; and,

FIG. 8 is a bottom view of the amplifier.

The broken lines shown are included for the purpose of illustrating portions of the amplifier that form no part of the claim. 

CLAIM The ornamental design for an amplifier, as shown and described. 